1. Catalytic degradation of bisphenol A by CoMnAl mixed metal oxides catalyzed peroxymonosulfate: Performance and mechanism.
- Author
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Li, Wen, Wu, Ping-xiao, Zhu, Yajie, Huang, Zhu-jian, Lu, Yong-hong, Li, Yue-wu, Dang, Zhi, and Zhu, Neng-wu
- Subjects
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BISPHENOL A , *METALLIC oxides , *ELECTROMAGNETIC waves , *IONIZING radiation , *X-ray spectra - Abstract
In this study, CoMnAl mixed metal oxides (CoMnAl-MMO) were prepared and employed in heterogeneous activation of Oxone for bisphenol A (BPA) degradation. Typically, 10 mg L −1 of BPA could be completely degraded under the coexistence of 0.02 g L −1 of CoMnAl-MMO and 0.15 g L −1 of Oxone within 90 min at 25 °C. The degradation performance was evaluated in view of metal leaching and various effects, e.g., pH, Oxone dosage and temperature. The results indicated that the system of MMO/Oxone was suitable for the treatment of wastewater and presented favorable recycling and stability in both neutral and alkaline conditions. It was confirmed that BPA degradation catalyzed by CoMnAl-MMO followed well with the first order kinetics model and the an activation energy was calculated as 76.83 kJ mol −1 . The sulfate radicals were recognized as the main species to oxidize pollutants in the MMO/Oxone system. Particular attention was paid to the catalysis activation mechanism of peroxymonosulfate and the degradation pathway of BPA, which were analyzed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopic (XPS), LC–MS and GC–MS. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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